选择恰当的词填空。

Who   How many    How tall   How much   When  

Why   What    Which    Where   How

________students are there in your class? There are 45.

________is cleaning the room?

________is Tom? He is 125cm.

________are your shorts? They are 80 yuan.

________did you do last summer holiday? I went to Beijing to visit my sister

________man is your father? The tallest one is.

________is Nina sad? She failed the math exam.

________did they went to the new movie? Last Tuesday afternoon..

________does Lily's sister Lucy feel?  She is very happy because they can go together.

________does your mother work?  A car factory.

下列有关食管心房调搏的描述，不正确的是（）.

A.对常见室上性心动过速发生机制的判断可提供帮助

B.诱发和终止房室结折返性心动过速

C.有助于鉴别室上性心动过速伴室内差异性传导与室性心动过速

D.有助于对自主神经功能的检测

E.有助于确定病态窦房结综合征的诊断